QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

8km S of Cabazon, CA

· 17 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 73 kmSan Diego County 91 kmOrange County 94 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.5 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Riverside County, 73 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2531 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 33.8422, -116.7802. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 73 km (45 mi) W of here earthquakes near Riverside County
San Diego County, CA 91 km (57 mi) N of here earthquakes near San Diego County
Orange County, CA 94 km (58 mi) ENE of here earthquakes near Orange County
San Bernardino County, CA 125 km (78 mi) SSW of here earthquakes near San Bernardino County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

49 earthquakes have been recorded within 50 km since this one.

  1. 1.5 9 km E of Running Springs, CA
  2. 1.7 13km WNW of Anza, CA
  3. 1.9 6km SW of Idyllwild, CA
  4. 1.6 8km NNE of Yucaipa, CA
  5. 1.9 3km W of Aguanga, CA
  6. 1.8 5km SE of Loma Linda, CA
  7. 2.0 6km NE of Aguanga, CA
  8. 1.9 18km ESE of Anza, CA
  9. 2.1 10km N of Cabazon, CA
  10. 1.6 4km SSW of Redlands, CA
  11. 1.9 10km S of Joshua Tree, CA
  12. 1.7 15km SE of Big Bear City, CA
  13. 1.6 13km NE of Yucaipa, CA
  14. 1.9 6km ENE of Aguanga, CA
  15. 1.7 13km ESE of Anza, CA

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2018-05-08 — it released about 31,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.